Polishing compound



Patented Dec. 1, 1937 OFFICE rousmno com ormn 11a J. Hooking, 'Sea cmr, N. r.

. No Drawing. Application December 19, 1936,

Serial No. 116,821

ii claims." (01. 51-230) h This invention has utilityin the art of polish! ing metallic articles, which involves pressing them upon the surface of a rapidly rotating body which may be a wheel, cylinder, cone, or rapidly moving belt of suitable material.

If the rotating body be a cone, cylinder or wheel, it is usually constructed of disks of cloth' of suitable toughness, clamped upon an arbor arranged for rapidr'otation, so that the centrifugalforce will maintain the disks in extended position, and

thus forma fairly rigid surface. The rotating I body may also be constructed of bristles, or threads, or cloth, cork or rubber, or wood, the criterion being that the surface shall be soft enough to carry the coating of abrasive hereinafterdescribed, and be yielding enough to avoid deformation-of the article being polished.

' It is customary to coat the rotating surface with an abrasive of suitable hardness and fineness, mixed with grease or with an adhesive or with a mixture of grease and adhesive. This mixture is usually applied in the form of a block, orstick, if it possesses suflicient rigidity to maintain that shape and has a'melting point sohigh that the heat engendered by the friction of the rotating body and the heat of the hand will not soften it so much as to cause it to losits rigidity.v

0 It may also be encased in paper, or metal or. other covering which may be of .suchconsistency as to be worn away along with the abrasive, or it may be scored into narrowstrips which maybe torn away to expose the abrasive mass.

For special types of finishes there are'many objections to the grease-containing abrasive, and

also to that which contains both grease and an adhesive. Thegrease alone has not sufficient adhesive power to resist the centrifugal force and.

therefore the adhesive does not always form a uniform coating-over the surface of the rotating body, but frequently balls up" thereon.

'that it is impossible to see the degree of polish which the article has obtained at any given time,

until it is removed.

.The object of this invention, therefore, is to provide an abrasive compound which is free from the faults above disclosed and free of grease, that I is, to produce a greaseless abrasive composition of warm weather and of a melting point so high that the friction of the rotating body shall not unduly soften it.

Another object of the invention'is to provide an abrasive composition that shall spread evenly over the surface of the rotating body, and that shall adhere thereto so that the balling up shall not occur.

Another object is an abrasive composition that will leave the polished surface free .from any coating derived from the abrasive, and not requiring any subsequent treatment to prepare it for use.

The invention accordingly comprises a composition of matter possessing the characteristics, properties and the relation of constituents which a will be exemplified in the composition hereinafter described and the scope of the invention beindicated inthe claims. 7

My invention is a greaseless abrasive composition of matter,adapted to be pressed against the surface of a rapidly rotating body and to leave upon said surface an even, tightly adherent coating which will not ball upnor form chunks, nor be thrown oil by centrifugal force, and which will not leave a film upon the articles being polished. Forconvenience in the description of the preparation of mycomposition, I divide the materials entering into it in four parts, as follows:

Part one so Pounds Water Glue x-5A ,7 22 e v n- Part two Shella pounds" 2 Borax 1% Water gallon 1 Part three Weight ounce Cresophane p ,1 Citronellav r Part four a Portland cemen 2 Alnndum 142 The following the process of compounding 50.

When the glue becomes completely dissolved, the glycerlne is added and thoroughly mixed in.

In the meantime, the borax of Part two is dissolved in the water, the solution brought to boilmg, the shellac gradually added and the boiling continued until it is completely dissolved.

This solution of Part two is then added to the solution of Part one which is still in the jacketed kettle, the water lost from the latter by evaporation restored, the Cresophane and citron'ella of Part three added, and the whole thoroughly mixed.

The Portland cement of Part four is thoroughly screened to separate any lumps which may be therein, the screening being directly into the mixture in the kettle. Ilhis is kept hot and the whole mixture agitated for half an hour.

The mixture is then filled into tubes of convenient size and suitable material, metal tubes being preferred, although paper, cardboard, cellophane may be used.

This composition when pressed upon the rotating body, yields an even coat to its surface, which adheres thereto and does not leave a film upon the surface of the article being polished. The film dries upon the rotating body, and the amount of glycerine used determines the plasticity and hardness of the coat. The amount ofglycerine used aboveis one per cent. For some purposes, especially in polishing large flat work, where flexibility of the glue head is not an important factor, it is preferable to omit the glycerine entirely.

The amount of Portland cement may also be changed, or it may be entirely omitted. Its function is to unite with a portion of the water of the mixture thereby stiffening it, and it also forms a small amount of concrete with the abradant. A variation of its amount will change the hardness of the mass.

The shellac also has the function of hardening and toughening the mixture and its amount can also vary to produce the necessary quality. While the Portland cement adds a certain amount of hardening, the major portion of hardness depends upon the shellac and borax. The Cresophane is a. preservative and the citronella is a perfume. I

Various changes may be made in this composition. For instance, the al-undum may be substituted by any other desired or suitable abrasive. I have used practically all the commercial ones, such as rouge, tripoli, the silicas, and carborundum with good success. In fact, the abrasive chosen should be that one which best works with the particular material being polished.

Since certain changes may be made in the above composition of matter and different embodimentsof the invention could be madewithout departing v the well known disinfectants may replace the first, 5 and other odoriferous compounds, the second.

from the scope thereof, it is intended that all matm ter contained in the above description shall be interpreted as descriptive or illustrative and not in a limiting sense. a

It is also to be understood that the following claims are intended to cover all the generic and 15 specific features of the invention described herein and all statements of the scope of the invention which as a matter of language might be said to fall therebetween; and that they are intended to be inclusive in scope and not exclusive, in that. 20

if desired, other materials may be added to my novel composition of matter herein claimed without departing from the spirit of the invention. Particularly it is to be understood that in said claims,'ingredients or components recited in the 25 singular are intended to include compatible mixtures of said ingredients wherever the sense permits.

I claim:

1. A composition of matter comprising a mix- 30 ture of glue, shellac, a shellac softening and dis- 40 solving material, a glue plasticizing material and an abrasive.

5.. A greaseless polishing compound in the form .of a solid mass, comprising glue, a glue plasticizing material, shellac, a shellac dissolving material, 4.,

an odoriferous compound. a preservative and an abrasive. r q

6. A composition of matter in the form of a solid mass comprising glue, a glue softening material in amount suflicient to givethe composition a suitable degree of hardness, a'gum which is soluble in a solution of borax, a disinfectant, an odoriferous material, and an abrasive.

HARRY J. HOSKING. 

